Solar jobs in California were down 14 percent in 2017, dragging down national numbers for the industry, according to an annual report.

Nationally, there was a 3.8 percent decline, marking the first year jobs have decreased since the survey was first released in 2010.

Among the reasons: 2016 was a banner year for the industry, the institution of time-of-use rates and concerns about solar tariffs.

The survey predicts a 5.2 percent increase in jobs in 2018.

Solar jobs in 2017 were down in California and the U.S. Here’s the full story:

After experiencing consistent year-over-year growth, the number of jobs in the solar energy sector took a hit in 2017, with California absorbing the biggest blow.

Solar employment dropped 14 percent in California last year, which was largely responsible for a 3.8 percent decline nationwide, according to the National Solar Jobs Census released earlier this week.

It marks the first time jobs have dropped since the organization came out with its first annual report in 2010.

California lost 13,636 jobs in 2017, more than any other state.

“Being the biggest solar state, it’s not surprising that California takes the biggest hit,” said Ed Gilliland senior director for The Solar Foundation, a nonprofit based in Washington D.C. that supports solar energy adoption and releases the census each year.

California is home to about 40 percent of the country’s solar capacity and employs almost eight times more solar workers than any other state.

Massachusetts saw a larger percentage drop in employment (21 percent) but California’s sheer size relative to the solar market dragged the national numbers into negative territory.

“I’m definitely seeing a little bit of a slowdown from the standpoint of jobs for solar in California,” he said.

Why solar numbers were down

One of the biggest reasons for the decline stemmed from the fact that 2016 was a banner year for the industry. Nationally, 51,000 solar jobs were added that year and California accounted for almost half of them.

New installations in the U.S. doubled from 7.5 gigawatts in 2015 to 15 gigawatts in 2016, in many cases from customers who feared Congress would get rid of the federal government’s 30 percent tax credit for solar projects.

Despite the headwinds, the businesses taking part in the Solar Census projected job growth of 5.2 percent (263,293 jobs) for 2018, citing figures that indicate more growth for the industry in the long-term.

In the past five years, the solar workforce in the U.S. increased 110 percent (16 percent annually), adding 131,000 jobs.

Twenty-nine states reported increases in solar jobs in 2017. Utah, Minnesota, Arizona and New Jersey reported the largest gains.

“We could definitely be in some choppy waters over the next year or two but the states with strong policies and strong economics should continue to do well and continue to grow,” Gilliland said.

Cinnamon, whose business took part in the Solar Census, said the prospects for small, local installers is still robust but the number of bigger installers is shrinking.

“Residential solar is inherently a local business,” Cinnamon said. “When you’re fixing up your house, getting a roof or upgrading your kitchen, you hire a local contractor because they give you the best customer service and best price. It’s the same with solar.”

Information for the census came from 2,389 establishments, of which The Solar Foundation said 77 percent “completed or substantially completed” the survey. The margin of error is plus or minus 1.25 percent for the national employment numbers.

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